In short, to keep Magic: The Gathering fresh you have to play it competitively, in draft formats and playing within a single set or at least within the current standard (the last 3 sets + the core set for the year) In comes MTG: Arena
Mono Red Aggro Fight Fire With Fire Of all the decks that can beat Vivi, good old Mono Red Aggro is Cauldron's worst match-up by a pretty significant margin
This cycle can (sometimes) enter the battlefield untapped and ready to go
Combos and Interactions There are no infinite combos in this deck, though theres one you can easily include if youre so inclined
Scheming Symmetry I adore Scheming Symmetry, but it requires some finesse
There are plenty of fun extra sets in Magic: The Gathering with the Mystery Boosters some of the absolute best to open, draft, and play with